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Título del libro: Microbial Biodegradation And Bioremediation: Techniques And Case Studies For Environmental Pollution
Título del capítulo: Role of rhizosphere microbiome during phytoremediation of heavy metals

Autores UNAM:
LUZ DE MARIA BRETON DEVAL; ANGEL ARTURO GUEVARA GARCIA; KATY JUAREZ LOPEZ; EFRAIN TOVAR SANCHEZ;
Autores externos:

Idioma:

Año de publicación:
2022
Palabras clave:

heavy metals pollution; metagenomics; phytoextraction; Phytoremediation; plantt-microorganism association; rhizosphere


Resumen:

Unlike organic contaminants, metals cannot be degraded and tend to bioaccumulate in the organism promoting their biomagnification along the food chains; therefore, sanitation of heavy metals (HMs) contaminated sites is a priority because HMs can affect all levels of biological organization?from molecules to ecosystems?including human health. Phytoremediation is a bioremediation technique with promising results to remove HMs. Plants and their associated microorganisms are used to extract, sequester, or reduce the toxicity of soil pollutants. Two of the most successful techniques of phytoremediation of HMs soil pollutants are stabilization and extraction. Plants establish interactions with diverse microorganisms and according to their proximity to the root, they are classified in: (1) external interactions, formed with free-living microorganisms living in the soil (rhizosphere) or with associated microorganisms found on the roots (rhizoplane); (2) internal interactions, formed with microorganisms capable of penetrating intercellularly (endophytes) or intracellularly (symbionts) in plant tissues. This chapter aims to provide a brief overview of the effects of HMs on microorganisms and plants and to understand the mechanisms implemented individually and collectively by microorganisms and plants to withstand high concentrations of HMs. © 2022 Elsevier Inc. All rights reserved.


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